It's funny how bass volume seems to be more pronounced on certain accordions. I have a little Hohner Fun Light which only has two treble voices, but a fairly powerful 4 voice bass. Similarly I have a Cavagnolo Bal Musette with three treble voices and 5 bass voices. Most people who have tried it out comment that the bass is too strong for the treble, and I can assure you the treble is very loud on that instrument when the three voice musette is selected. There are couplers which can switch some of the bass voices off, but the accordion was built for delivering full on musette and grunting basses for the benefit of dancers.
On the other hand I know that my Maugein Mini Sonora and believe that my Marinucci CBA (both three voice LMM) only have 4 bass voices each (would need to open up the Marinucci to double check). These latter two instruments definitely sound more balanced than the Cavagnolo, as does the little Hohner, despite the fact that it has double the bass voices that it has treble.
The upshot of all this is that the Cavagnolo can be uncomfortably loud when being played at home, with the bass definitely getting the blame for disturbing the household. The "red hot" button technique described by George does work to a degree, and all I have to learn now is how to apply that same trick to the treble side! Funny thing was when I bought it I had a choice of three "identical" instruments. They may have looked identical but each one had its own distinct sound. The salesman invited me to play each one while he was in an adjacent room, and he could identify all three "blind", due to the slightly different musette tunings of each. He could also tell them apart by their bass volume relative to each other. I was impressed by that but still ended up buying the wrong one (for me) with the strongest musette and loudest bass. Had I known more about accordions at the time, I would have gone for one of the other two with a more mellow musette tone and quieter bass. Maybe there were different types of reeds in each of them, but I'll never know now. It served to illustrate to me that you cannot try out an accordion in a shop, then place an order for an identical instrument, expecting it to be exactly the same. Chances are you'll get something approaching what you tried out, but perhaps not identical in every respect.